Having problems with BG-12 natural gas conversion

[scone]

I've seen this done successfully, but for some reason i'm getting a very dirty yellow flame. I'm using a burner exactly like this one :http://www.amazon.com/dp/B0009JXYT6/?tag=skimlinks_replacement-20 with a pre-made natural gas orifice (http://www.brewershardware.com/Valve-and-NG-Orifice-for-BURN10-BURNVALVENAT.html). The BG-12 has a 1/8" NPT input so I also had to tack on a converter like this: http://www.amazon.com/gp/product/B000BOAA6O/?tag=skimlinks_replacement-20

Trouble is, the flame is really big and very yellow (clearly burning in a very oxygen starved manner and probably making lots of nice carbon monoxide). The burner seems to have the same venturi style air shutter and it doesn't matter where i set it, or even removing it doesn't seem to help. However, I know it's an air supply problem b/c if I take a small tube and insert it into the air shutter opening and blow air into it, I can get a nice pure blue flame while i'm blowing air.

Is there anything I can do to fix the issue? I'd rather avoid getting a different burner or an aquarium air pump or something if at all possible....

Could the issue be that I had to add an adapter? I'm not sure if I've messed up the air uptake dynamics by recessing the natural gas orifice back a bit farther than intended, but if so maybe i can get an extension for the little orifice nipple or something.... Any advice is greatly appreciated...

 

[scone]

Well for anyone that has a similar problem, i've gotten closer to a working solution by rigging up an "extender" to the orifice on the end of http://www.brewershardware.com/Valve...NVALVENAT.html so that it extends past the 1/4" to 1/8" converter and into the end of the BG12 burner. I used compression sleeve inserts like this (http://www.homedepot.com/p/Watts-1-...rt-A-8/100638201?keyword=DELRIN+SLEEVE/INSERT) and some brass washers that fit into the 1/4" threaded area to put pressure on it.

I can't say that it's working great as the flame is really yellow still when it's turned up all the way, and using an extender is a pretty finicky in the first place.

In case anyone is thinking about it, DON'T use a 1/4" orifice and think you can adapt it down to make it work on the BG12 burner. The flame is still super sooty.

 

[LLBeanJ]

Take a look at P/N CVO125 at this web site. It will allow you to bypass the 1/4" NPT to 1/8" NPT reducer. If you buy it, just tell them you need the orifice sized for NG (s/b Ø.125")

http://gashosesandregulators.com/brassfittings.html

 

[apezz]

Take a look at P/N CVO125 at this web site. It will allow you to bypass the 1/4" NPT to 1/8" NPT reducer. If you buy it, just tell them you need the orifice sized for NG (s/b Ø.125")

http://gashosesandregulators.com/brassfittings.html

Have you done this and can confirm it works correctly with the BG12?

 

[LLBeanJ]

Have you done this and can confirm it works correctly with the BG12?

No, I have not. My recommendation came from another thread where the OP was looking for the exact same solution. After much back and forth, he settled on that valve for his BG12. He never posted back as to whether it worked out or not, so you may want to post your question in that thread.